exam Maths Puzzle Numerical Ability

What makes a number real, whole,natural, interger, irratiional, rational?

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exam Other Question

The ancient Greeks thought that the most pleasing shape for rectangle was one for which the ratio. If the length of a rectangular painting is 2 ft longer than its width, then for what dimention would the length and width have the golden ratio? log5 (base of 5) of x + 3 (no parentheses) = log5 (base of 5) of (x-20) + 4